Late-Night Sugar Snacks Linked to Higher Dementia Risk, Studies Warn
New research suggests that late-day sweet snacks could harm brain health over time. Studies link evening sugar consumption to higher dementia risk, particularly when treats replace balanced meals. Experts now recommend smarter snacking habits to protect cognitive function.
Over the past five years, around 15–20 scientific studies have examined how sugar intake in later life affects dementia risk. Research published in Alzheimer's & Dementia and meta-analyses in Nutrients (2023, 2024) highlight a key concern: sharp blood sugar spikes from sweet snacks may damage brain cells. These fluctuations appear more harmful when sweets are eaten in the late afternoon or evening.
Eating desserts after a proper meal causes less harm than using them as meal replacements. Nutritionists advise opting for snacks rich in protein, fibre, and healthy fats instead. Nuts, yogurt, or fresh fruit help stabilize blood sugar and support brain health.
The findings build on long-term cohort studies tracking older adults' diets. While occasional treats pose little risk, frequent late-day sugar consumption shows a clearer link to cognitive decline. Researchers stress that timing and food choices both play a role in long-term brain function.
The evidence points to a simple but important shift: replacing sugary evening snacks with nutritious alternatives. Steady blood sugar levels, maintained through better food choices, may lower dementia risk over time. Public health guidelines could soon reflect these findings to help people make safer dietary decisions.
